2017 Dec 15, 04:01 PM
The timing algorithm looks at the start and stop times. If the pump is scheduled to run from 12:00 until 2:00 and there is a power outage from 12:30 to 1:30 the pump should run from 12:00 until 12:30 and then from 1:30 until 2:00.
This also depends on how the Raspi is powered. If the power outage stop the Pi from running it will need to reset it's time when the power comes back on. The Pi gets it's time setting from the internet. It will either need a reliable internet connection, a battery backup to keep the Pi running during the power outage or the system will need to have an RTC to keep the time setting. There is information about using an RTC in the SIP documentation and you can find out about RTC modules on the internet.
This also depends on how the Raspi is powered. If the power outage stop the Pi from running it will need to reset it's time when the power comes back on. The Pi gets it's time setting from the internet. It will either need a reliable internet connection, a battery backup to keep the Pi running during the power outage or the system will need to have an RTC to keep the time setting. There is information about using an RTC in the SIP documentation and you can find out about RTC modules on the internet.